Fe²⁺ + 2e^- → Fe(s) E° = -0.440 V
2H⁺ + 2e^- → H₂(g) E° = 0.000 V
In a galvanic cell, the iron compartment contains an iron electrode, and [Fe²⁺] = 1.00 × 10^-3 M. The hydrogen compartment contains a platinum electrode (P_H2 = 1.00 atm) and a weak acid HA at an initial concentration of 1.00 M. If the observed cell potential is 0.333 V at 25°C, calculate K_a for the weak acid HA at 25°C.

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The Answer of Fe²⁺ + 2e^- → Fe(s) E° = -0.440 V 2H⁺ + 2e^- → H₂(g) E° = 0.000 V In a galvanic cell, the iron compartment contains an iron electrode, and [Fe²⁺] = 1.00 × 10^-3 M. The hydrogen compartment contains a platinum electrode (P_H2 = 1.00 atm) and a weak acid HA at an initial concentration of 1.00 M. If the observed cell potential is 0.333 V at 25°C, calculate K_a for the weak acid HA at 25°C.

Fe2+ + 2e- → Fe(s) E° = -0

Fe²⁺ + 2e^- → Fe(s) E° = -0